The most common and most likely answer to this crossword clue is the 8 letter word HEADS-UP
H
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Buddy explains!
The straight part
We know that "Manages/a warning" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case manages/a warning = heads-up.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does HEADS-UP mean?
HEADS-UP noun- A warning or call to pay attention; an advisory notice; a notice of what is to happen; a holler.
- Involving two players. (usually said when there are only two players in the table; or, when all players except two folded)
- With head directly above the neck, eyes front.
- Alert; vigilant